Converted Observatory cpu-profile element

runtime/observatory/lib/src/elements/cpu_profile.dart

Index: runtime/observatory/lib/src/elements/cpu_profile.dart
diff --git a/runtime/observatory/lib/src/elements/cpu_profile.dart b/runtime/observatory/lib/src/elements/cpu_profile.dart
index 82f479d00e370e27122b69741a7412bd50061b6b..0b24b07481f76ea90bf9023d4ca9eb81692f6ee6 100644
--- a/runtime/observatory/lib/src/elements/cpu_profile.dart
+++ b/runtime/observatory/lib/src/elements/cpu_profile.dart
@@ -6,1571 +6,168 @@ library cpu_profile_element;
 
 import 'dart:async';
 import 'dart:html';
-import 'observatory_element.dart';
 import 'package:observatory/models.dart' as M;
-import 'package:observatory/service.dart';
-import 'package:observatory/app.dart';
-import 'package:observatory/cpu_profile.dart';
-import 'package:observatory/elements.dart';
-import 'package:polymer/polymer.dart';
+import 'package:observatory/src/elements/cpu_profile/virtual_tree.dart';
+import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
+import 'package:observatory/src/elements/helpers/tag.dart';
+import 'package:observatory/src/elements/helpers/uris.dart';
+import 'package:observatory/src/elements/nav/bar.dart';
+import 'package:observatory/src/elements/nav/isolate_menu.dart';
+import 'package:observatory/src/elements/nav/menu.dart';
+import 'package:observatory/src/elements/nav/notify.dart';
+import 'package:observatory/src/elements/nav/refresh.dart';
+import 'package:observatory/src/elements/nav/top_menu.dart';
+import 'package:observatory/src/elements/nav/vm_menu.dart';
+import 'package:observatory/src/elements/sample_buffer_control.dart';
+import 'package:observatory/src/elements/stack_trace_tree_config.dart';
+
+class CpuProfileElement  extends HtmlElement implements Renderable {
+  static const tag = const Tag<CpuProfileElement>('cpu-profile',
+                                            dependencies: const [
+                                              NavBarElement.tag,
+                                              NavTopMenuElement.tag,
+                                              NavVMMenuElement.tag,
+                                              NavIsolateMenuElement.tag,
+                                              NavMenuElement.tag,
+                                              NavMenuElement.tag,
+                                              NavRefreshElement.tag,
+                                              NavNotifyElement.tag,
+                                              SampleBufferControlElement.tag,
+                                              StackTraceTreeConfigElement.tag,
+                                              CpuProfileVirtualTreeElement.tag,
+                                            ]);
+
+  RenderingScheduler<CpuProfileElement> _r;
+
+  Stream<RenderedEvent<CpuProfileElement>> get onRendered => _r.onRendered;
+
+  M.VM _vm;
+  M.IsolateRef _isolate;
+  M.EventRepository _events;
+  M.NotificationRepository _notifications;
+  M.IsolateSampleProfileRepository _profiles;
+  Stream<M.SampleProfileLoadingProgressEvent> _progressStream;
+  M.SampleProfileLoadingProgress _progress;
+  M.SampleProfileTag _tag = M.SampleProfileTag.none;
+  ProfileTreeMode _mode = ProfileTreeMode.function;
+  M.ProfileTreeDirection _direction = M.ProfileTreeDirection.exclusive;
+  String _filter = '';
+
+
+  M.IsolateRef get isolate => _isolate;
+  M.NotificationRepository get notifications => _notifications;
+  M.IsolateSampleProfileRepository get profiles => _profiles;
+  M.VMRef get vm => _vm;
+
+  factory CpuProfileElement(M.VM vm, M.IsolateRef isolate,
+                            M.EventRepository events,
+                            M.NotificationRepository notifications,
+                            M.IsolateSampleProfileRepository profiles,
+                            {RenderingQueue queue}) {
+    assert(vm != null);
+    assert(isolate != null);
+    assert(events != null);
+    assert(notifications != null);
+    assert(profiles != null);
+    CpuProfileElement e = document.createElement(tag.name);
+    e._r = new RenderingScheduler(e, queue: queue);
+    e._vm = vm;
+    e._isolate = isolate;
+    e._events = events;
+    e._notifications = notifications;
+    e._profiles = profiles;
+    return e;
+  }
+
+  CpuProfileElement.created() : super.created();
 
-List<String> sorted(Set<String> attributes) {
-  var list = attributes.toList();
-  list.sort();
-  return list;
-}
-
-abstract class ProfileTreeRow<T> extends TableTreeRow {
-  final CpuProfile profile;
-  final T node;
-  final String selfPercent;
-  final String percent;
-  bool _infoBoxShown = false;
-  HtmlElement infoBox;
-  HtmlElement infoButton;
-
-  ProfileTreeRow(TableTree tree, TableTreeRow parent,
-                 this.profile, this.node, double selfPercent, double percent)
-      : super(tree, parent),
-        selfPercent = Utils.formatPercentNormalized(selfPercent),
-        percent = Utils.formatPercentNormalized(percent);
-
-  static _addToMemberList(DivElement memberList, Map<String, String> items) {
-    items.forEach((k, v) {
-      var item = new DivElement();
-      item.classes.add('memberItem');
-      var name = new DivElement();
-      name.classes.add('memberName');
-      name.text = k;
-      var value = new DivElement();
-      value.classes.add('memberValue');
-      value.text = v;
-      item.children.add(name);
-      item.children.add(value);
-      memberList.children.add(item);
-    });
-  }
-
-  makeInfoBox() {
-    if (infoBox != null) {
-      return;
-    }
-    infoBox = new DivElement();
-    infoBox.classes.add('infoBox');
-    infoBox.classes.add('shadow');
-    infoBox.style.display = 'none';
-    listeners.add(infoBox.onClick.listen((e) => e.stopPropagation()));
-  }
-
-  makeInfoButton() {
-    infoButton = new SpanElement();
-    infoButton.style.marginLeft = 'auto';
-    infoButton.style.marginRight = '1em';
-    infoButton.children.add(new Element.tag('icon-info-outline'));
-    listeners.add(infoButton.onClick.listen((event) {
-      event.stopPropagation();
-      toggleInfoBox();
-    }));
-  }
-
-  static const attributes = const {
-    'optimized' : const ['O', null, 'Optimized'],
-    'unoptimized' : const ['U', null, 'Unoptimized'],
-    'inlined' : const ['I', null, 'Inlined'],
-    'intrinsic' : const ['It', null, 'Intrinsic'],
-    'ffi' : const ['F', null, 'FFI'],
-    'dart' : const ['D', null, 'Dart'],
-    'tag' : const ['T', null, 'Tag'],
-    'native' : const ['N', null, 'Native'],
-    'stub': const ['S', null, 'Stub'],
-    'synthetic' : const ['?', null, 'Synthetic'],
-  };
-
-  HtmlElement newAttributeBox(String attribute) {
-    List attributeDetails = attributes[attribute];
-    if (attributeDetails == null) {
-      print('could not find attribute $attribute');
-      return null;
-    }
-    var element = new SpanElement();
-    element.style.border = 'solid 2px #ECECEC';
-    element.style.height = '100%';
-    element.style.display = 'inline-block';
-    element.style.textAlign = 'center';
-    element.style.minWidth = '1.5em';
-    element.style.fontWeight = 'bold';
-    if (attributeDetails[1] != null) {
-      element.style.backgroundColor = attributeDetails[1];
-    }
-    element.text = attributeDetails[0];
-    element.title = attributeDetails[2];
-    return element;
-  }
-
-  onHide() {
-    super.onHide();
-    infoBox = null;
-    infoButton = null;
-  }
-
-  showInfoBox() {
-    if ((infoButton == null) || (infoBox == null)) {
-      return;
-    }
-    _infoBoxShown = true;
-    infoBox.style.display = 'block';
-    infoButton.children.clear();
-    infoButton.children.add(new Element.tag('icon-info'));
-  }
-
-  hideInfoBox() {
-    _infoBoxShown = false;
-    if ((infoButton == null) || (infoBox == null)) {
-      return;
-    }
-    infoBox.style.display = 'none';
-    infoButton.children.clear();
-    infoButton.children.add(new Element.tag('icon-info-outline'));
-  }
-
-  toggleInfoBox() {
-   if (_infoBoxShown) {
-     hideInfoBox();
-   } else {
-     showInfoBox();
-   }
-  }
-
-  hideAllInfoBoxes() {
-    final List<ProfileTreeRow> rows = tree.rows;
-    for (var row in rows) {
-      row.hideInfoBox();
-    }
-  }
-
-  onClick(MouseEvent e) {
-    e.stopPropagation();
-    if (e.altKey) {
-      bool show = !_infoBoxShown;
-      hideAllInfoBoxes();
-      if (show) {
-        showInfoBox();
-      }
-      return;
-    }
-    super.onClick(e);
-  }
-
-  HtmlElement newCodeRef(ProfileCode code) {
-    var codeRef = new Element.tag('code-ref');
-    codeRef.ref = code.code;
-    return codeRef;
-  }
-
-  HtmlElement newFunctionRef(ProfileFunction function) {
-    var ref = new Element.tag('function-ref');
-    ref.ref = function.function;
-    return ref;
-  }
-
-  HtmlElement hr() {
-    var element = new HRElement();
-    return element;
-  }
-
-  HtmlElement div(String text) {
-    var element = new DivElement();
-    element.text = text;
-    return element;
-  }
-
-  HtmlElement br() {
-    return new BRElement();
-  }
-
-  HtmlElement span(String text) {
-    var element = new SpanElement();
-    element.style.minWidth = '1em';
-    element.text = text;
-    return element;
-  }
-}
-
-class CodeProfileTreeRow extends ProfileTreeRow<CodeCallTreeNode> {
-  CodeProfileTreeRow(TableTree tree, CodeProfileTreeRow parent,
-                     CpuProfile profile, CodeCallTreeNode node)
-      : super(tree, parent, profile, node,
-              node.profileCode.normalizedExclusiveTicks,
-              node.percentage) {
-    // fill out attributes.
-  }
-
-  bool hasChildren() => node.children.length > 0;
-
-  void onShow() {
-    super.onShow();
-
-    if (children.length == 0) {
-      for (var childNode in node.children) {
-        var row = new CodeProfileTreeRow(tree, this, profile, childNode);
-        children.add(row);
-      }
-    }
-
-    // Fill in method column.
-    var methodColumn = flexColumns[0];
-    methodColumn.style.justifyContent = 'flex-start';
-    methodColumn.style.position = 'relative';
-
-    // Percent.
-    var percentNode = new DivElement();
-    percentNode.text = percent;
-    percentNode.style.minWidth = '5em';
-    percentNode.style.textAlign = 'right';
-    percentNode.title = 'Executing: $selfPercent';
-    methodColumn.children.add(percentNode);
-
-    // Gap.
-    var gap = new SpanElement();
-    gap.style.minWidth = '1em';
-    methodColumn.children.add(gap);
-
-    // Code link.
-    var codeRef = newCodeRef(node.profileCode);
-    codeRef.style.alignSelf = 'center';
-    methodColumn.children.add(codeRef);
-
-    gap = new SpanElement();
-    gap.style.minWidth = '1em';
-    methodColumn.children.add(gap);
-
-    for (var attribute in sorted(node.attributes)) {
-      methodColumn.children.add(newAttributeBox(attribute));
-    }
-
-    makeInfoBox();
-    methodColumn.children.add(infoBox);
-
-    infoBox.children.add(span('Code '));
-    infoBox.children.add(newCodeRef(node.profileCode));
-    infoBox.children.add(span(' '));
-    for (var attribute in sorted(node.profileCode.attributes)) {
-      infoBox.children.add(newAttributeBox(attribute));
-    }
-    infoBox.children.add(br());
-    infoBox.children.add(br());
-    var memberList = new DivElement();
-    memberList.classes.add('memberList');
-    infoBox.children.add(br());
-    infoBox.children.add(memberList);
-    ProfileTreeRow._addToMemberList(memberList, {
-        'Exclusive ticks' : node.profileCode.formattedExclusiveTicks,
-        'Cpu time' : node.profileCode.formattedCpuTime,
-        'Inclusive ticks' : node.profileCode.formattedInclusiveTicks,
-        'Call stack time' : node.profileCode.formattedOnStackTime,
-    });
-
-    makeInfoButton();
-    methodColumn.children.add(infoButton);
-
-    // Fill in self column.
-    var selfColumn = flexColumns[1];
-    selfColumn.style.position = 'relative';
-    selfColumn.style.alignItems = 'center';
-    selfColumn.text = selfPercent;
-  }
-}
-
-class FunctionProfileTreeRow extends ProfileTreeRow<FunctionCallTreeNode> {
-  FunctionProfileTreeRow(TableTree tree, FunctionProfileTreeRow parent,
-                         CpuProfile profile, FunctionCallTreeNode node)
-      : super(tree, parent, profile, node,
-              node.profileFunction.normalizedExclusiveTicks,
-              node.percentage) {
-    // fill out attributes.
-  }
-
-  bool hasChildren() => node.children.length > 0;
-
-  onShow() {
-    super.onShow();
-    if (children.length == 0) {
-      for (var childNode in node.children) {
-        var row = new FunctionProfileTreeRow(tree, this, profile, childNode);
-        children.add(row);
-      }
-    }
-
-    var methodColumn = flexColumns[0];
-    methodColumn.style.justifyContent = 'flex-start';
-
-    var codeAndFunctionColumn = new DivElement();
-    codeAndFunctionColumn.classes.add('flex-column');
-    codeAndFunctionColumn.style.justifyContent = 'center';
-    codeAndFunctionColumn.style.width = '100%';
-    methodColumn.children.add(codeAndFunctionColumn);
-
-    var functionRow = new DivElement();
-    functionRow.classes.add('flex-row');
-    functionRow.style.position = 'relative';
-    functionRow.style.justifyContent = 'flex-start';
-    codeAndFunctionColumn.children.add(functionRow);
-
-    // Insert the parent percentage
-    var parentPercent = new SpanElement();
-    parentPercent.text = percent;
-    parentPercent.style.minWidth = '4em';
-    parentPercent.style.alignSelf = 'center';
-    parentPercent.style.textAlign = 'right';
-    parentPercent.title = 'Executing: $selfPercent';
-    functionRow.children.add(parentPercent);
-
-    // Gap.
-    var gap = new SpanElement();
-    gap.style.minWidth = '1em';
-    gap.text = ' ';
-    functionRow.children.add(gap);
-
-    var functionRef = new Element.tag('function-ref');
-    functionRef.ref = node.profileFunction.function;
-    functionRef.style.alignSelf = 'center';
-    functionRow.children.add(functionRef);
-
-    gap = new SpanElement();
-    gap.style.minWidth = '1em';
-    gap.text = ' ';
-    functionRow.children.add(gap);
-
-    for (var attribute in sorted(node.attributes)) {
-      functionRow.children.add(newAttributeBox(attribute));
-    }
-
-    makeInfoBox();
-    functionRow.children.add(infoBox);
-
-    if (M.hasDartCode(node.profileFunction.function.kind)) {
-      infoBox.children.add(div('Code for current node'));
-      infoBox.children.add(br());
-      var totalTicks = node.totalCodesTicks;
-      var numCodes = node.codes.length;
-      for (var i = 0; i < numCodes; i++) {
-        var codeRowSpan = new DivElement();
-        codeRowSpan.style.paddingLeft = '1em';
-        infoBox.children.add(codeRowSpan);
-        var nodeCode = node.codes[i];
-        var ticks = nodeCode.ticks;
-        var percentage = Utils.formatPercent(ticks, totalTicks);
-        var percentageSpan = new SpanElement();
-        percentageSpan.style.display = 'inline-block';
-        percentageSpan.text = '$percentage';
-        percentageSpan.style.minWidth = '5em';
-        percentageSpan.style.textAlign = 'right';
-        codeRowSpan.children.add(percentageSpan);
-        var codeRef = new Element.tag('code-ref');
-        codeRef.ref = nodeCode.code.code;
-        codeRef.style.marginLeft = '1em';
-        codeRef.style.marginRight = 'auto';
-        codeRef.style.width = '100%';
-        codeRowSpan.children.add(codeRef);
-      }
-      infoBox.children.add(hr());
-    }
-    infoBox.children.add(span('Function '));
-    infoBox.children.add(newFunctionRef(node.profileFunction));
-    infoBox.children.add(span(' '));
-    for (var attribute in sorted(node.profileFunction.attributes)) {
-      infoBox.children.add(newAttributeBox(attribute));
-    }
-    var memberList = new DivElement();
-    memberList.classes.add('memberList');
-    infoBox.children.add(br());
-    infoBox.children.add(br());
-    infoBox.children.add(memberList);
-    infoBox.children.add(br());
-    ProfileTreeRow._addToMemberList(memberList, {
-        'Exclusive ticks' : node.profileFunction.formattedExclusiveTicks,
-        'Cpu time' : node.profileFunction.formattedCpuTime,
-        'Inclusive ticks' : node.profileFunction.formattedInclusiveTicks,
-        'Call stack time' : node.profileFunction.formattedOnStackTime,
-    });
-
-    if (M.hasDartCode(node.profileFunction.function.kind)) {
-      infoBox.children.add(div('Code containing function'));
-      infoBox.children.add(br());
-      var totalTicks = profile.sampleCount;
-      var codes = node.profileFunction.profileCodes;
-      var numCodes = codes.length;
-      for (var i = 0; i < numCodes; i++) {
-        var codeRowSpan = new DivElement();
-        codeRowSpan.style.paddingLeft = '1em';
-        infoBox.children.add(codeRowSpan);
-        var profileCode = codes[i];
-        var code = profileCode.code;
-        var ticks = profileCode.inclusiveTicks;
-        var percentage = Utils.formatPercent(ticks, totalTicks);
-        var percentageSpan = new SpanElement();
-        percentageSpan.style.display = 'inline-block';
-        percentageSpan.text = '$percentage';
-        percentageSpan.style.minWidth = '5em';
-        percentageSpan.style.textAlign = 'right';
-        percentageSpan.title = 'Inclusive ticks';
-        codeRowSpan.children.add(percentageSpan);
-        var codeRef = new Element.tag('code-ref');
-        codeRef.ref = code;
-        codeRef.style.marginLeft = '1em';
-        codeRef.style.marginRight = 'auto';
-        codeRef.style.width = '100%';
-        codeRowSpan.children.add(codeRef);
-      }
-    }
-
-    makeInfoButton();
-    methodColumn.children.add(infoButton);
-
-    // Fill in self column.
-    var selfColumn = flexColumns[1];
-    selfColumn.style.position = 'relative';
-    selfColumn.style.alignItems = 'center';
-    selfColumn.text = selfPercent;
-  }
-}
-
-@CustomTag('sample-buffer-control')
-class SampleBufferControlElement extends ObservatoryElement {
-  SampleBufferControlElement.created() : super.created() {
-    _stopWatch.start();
-  }
-
-  Future<CpuProfile> reload(Isolate isolate) async {
-    profile.clear();
-    if (isolate == null) {
-      _update(profile);
-      // Notify listener.
-      onSampleBufferUpdate(profile);
-      return profile;
-    }
-    profileVM = isolate.vm.profileVM;
-    if (tagSelector == null) {
-      // Set default value.
-      tagSelector = profileVM ? 'UserVM' : 'None';
-    }
-    await _changeState(kFetchingState);
-    try {
-      var response;
-      if (allocationProfileClass != null) {
-        response =
-            await allocationProfileClass.getAllocationSamples(tagSelector);
-      } else {
-        var params = { 'tags': tagSelector };
-        response = await isolate.invokeRpc('_getCpuProfile', params);
-      }
-      await _changeState(kLoadingState);
-      profile.load(isolate, response);
-      profile.buildFunctionCallerAndCallees();
-      _update(profile);
-      await _changeState(kLoadedState);
-      // Notify listener.
-      onSampleBufferUpdate(profile);
-      return profile;
-    } catch (e, st) {
-      if (e is ServerRpcException) {
-        ServerRpcException se = e;
-        if (se.code == ServerRpcException.kFeatureDisabled) {
-          await _changeState(kDisabledState);
-          return profile;
-        }
-      }
-      await _changeState(kExceptionState, e, st);
-      rethrow;
-    }
-  }
-
-  Future _changeState(String newState, [exception, stackTrace]) {
-    if ((newState == kDisabledState) ||
-        (newState == kFetchingState) ||
-        (newState == kExceptionState)) {
-      loadTime = '';
-      fetchTime = '';
-    } else if (newState == kLoadingState) {
-      fetchTime = formatTimeMilliseconds(_stopWatch.elapsedMilliseconds);
-      loadTime = '';
-    } else if (newState == kLoadedState) {
-      loadTime = formatTimeMilliseconds(_stopWatch.elapsedMilliseconds);
-    }
-    state = newState;
-    this.exception = exception;
-    this.stackTrace = stackTrace;
-    _stopWatch.reset();
-    return window.animationFrame;
-  }
-
-  _update(CpuProfile sampleBuffer) {
-    sampleCount = profile.sampleCount.toString();
-    refreshTime = new DateTime.now().toString();
-    stackDepth = profile.stackDepth.toString();
-    sampleRate = profile.sampleRate.toStringAsFixed(0);
-    if (profile.sampleCount == 0) {
-      timeSpan = '0s';
-    } else {
-      timeSpan = formatTime(profile.timeSpan);
-    }
-  }
-
-  void tagSelectorChanged(oldValue) {
-    reload(profile.isolate);
-  }
-
-  Function onSampleBufferUpdate;
-  @observable bool showTagSelector = true;
-  @observable bool profileVM = false;
-  @observable String sampleCount = '';
-  @observable String refreshTime = '';
-  @observable String sampleRate = '';
-  @observable String stackDepth = '';
-  @observable String timeSpan = '';
-  @observable String fetchTime = '';
-  @observable String loadTime = '';
-  @observable String tagSelector;
-  @observable String state = kFetchingState;
-  @observable var exception;
-  @observable var stackTrace;
-
-  static const kDisabledState = 'kDisabled';
-  static const kExceptionState = 'Exception';
-  static const kFetchingState = 'kFetching';
-  static const kLoadedState = 'kLoaded';
-  static const kLoadingState = 'kLoading';
-  static const kNotLoadedState = 'kNotLoaded';
-
-  Isolate isolate;
-  Class allocationProfileClass;
-
-  final CpuProfile profile = new CpuProfile();
-  final Stopwatch _stopWatch = new Stopwatch();
-}
-
-@CustomTag('stack-trace-tree-config')
-class StackTraceTreeConfigElement extends ObservatoryElement {
-  StackTraceTreeConfigElement.created() : super.created();
-
-  attached() {
-    super.attached();
-    var filterElement = shadowRoot.querySelector('#filterInput');
-    keyDownSubscription = filterElement.onKeyDown.listen(_onKeyDown);
-    blurSubscription = filterElement.onBlur.listen(_onBlur);
-  }
-
-  detached() {
-    super.detached();
-    keyDownSubscription?.cancel();
-    blurSubscription?.cancel();
-  }
-
-  void _onKeyDown(KeyboardEvent keyEvent) {
-    if (keyEvent.keyCode == 13) {
-      // On enter, update the filter string.
-      filterString =
-          (shadowRoot.querySelector('#filterInput') as InputElement).value;
-      if (onTreeConfigChange == null) {
-        return;
-      }
-      onTreeConfigChange(modeSelector, directionSelector, filterString);
-    }
-  }
-
-  void _onBlur(Event event) {
-    // Input box has lost focus, update the display to match the active
-    // filter string.
-    (shadowRoot.querySelector('#filterInput') as InputElement).value =
-        filterString;
-  }
-
-  void modeSelectorChanged(oldValue) {
-    if (onTreeConfigChange == null) {
-      return;
-    }
-    onTreeConfigChange(modeSelector, directionSelector, filterString);
-  }
-
-  void directionSelectorChanged(oldValue) {
-    if (onTreeConfigChange == null) {
-      return;
-    }
-    onTreeConfigChange(modeSelector, directionSelector, filterString);
-  }
-
-  Function onTreeConfigChange;
-  StreamSubscription keyDownSubscription;
-  StreamSubscription blurSubscription;
-  @observable bool show = true;
-  @observable bool showModeSelector = true;
-  @observable bool showDirectionSelector = true;
-  @observable bool showFilter = true;
-  @observable String modeSelector = 'Function';
-  @observable String directionSelector = 'Up';
-  @observable String filterString;
-}
-
-class FunctionCallTreeNodeRow extends VirtualTreeRow {
-  final CpuProfile profile;
-  final FunctionCallTreeNode node;
-  String selfPercent;
-  String totalPercent;
-  String percent;
-
-  static const kHotThreshold = 0.05;  // 5%.
-  static const kMediumThreshold = 0.02;  // 2%.
-
-  double _percent(bool self) {
-    if (self) {
-      return node.profileFunction.normalizedExclusiveTicks;
-    } else {
-      return node.profileFunction.normalizedInclusiveTicks;
-    }
-  }
-
-  bool isHot(bool self) => _percent(self) > kHotThreshold;
-  bool isMedium(bool self) => _percent(self) > kMediumThreshold;
-
-  String rowClass(bool self) {
-    if (isHot(self)) {
-      return 'hotProfile';
-    } else if (isMedium(self)) {
-      return 'mediumProfile';
-    } else {
-      return 'coldProfile';
-    }
-  }
-
-  FunctionCallTreeNodeRow(VirtualTree tree,
-                          int depth,
-                          this.profile,
-                          FunctionCallTreeNode node)
-      : node = node,
-        super(tree, depth) {
-    if ((node.profileFunction.function.kind == M.FunctionKind.tag) &&
-        (node.profileFunction.normalizedExclusiveTicks == 0) &&
-        (node.profileFunction.normalizedInclusiveTicks == 0)) {
-    selfPercent = '';
-    totalPercent = '';
-    } else {
-      selfPercent = Utils.formatPercentNormalized(
-          node.profileFunction.normalizedExclusiveTicks);
-      totalPercent = Utils.formatPercentNormalized(
-          node.profileFunction.normalizedInclusiveTicks);
-    }
-    percent = Utils.formatPercentNormalized(node.percentage);
-  }
-
-  void onRender(DivElement rowDiv) {
-    rowDiv.children.add(makeGap(ems:0.1));
-    rowDiv.children.add(
-        makeText(totalPercent,
-                 toolTip: 'global % on stack'));
-    rowDiv.children.add(makeGap());
-    rowDiv.children.add(
-        makeText(selfPercent,
-                 toolTip: 'global % executing'));
-    rowDiv.children.add(makeGap());
-    rowDiv.children.add(makeIndenter(depth, colored: false));
-    rowDiv.children.add(makeColorBar(depth));
-    rowDiv.children.add(makeGap(ems: 1.0));
-    rowDiv.children.add(makeExpander());
-    rowDiv.children.add(
-        makeText(percent, toolTip: 'tree node %', flexBasis: null));
-    rowDiv.children.add(makeGap(ems: 0.5));
-    functionRef.ref = node.profileFunction.function;
-    rowDiv.children.add(functionRef);
-  }
-
-  var functionRef = new Element.tag('function-ref');
-
-  int get childCount => node.children.length;
-
-  void onShow() {
-    if (children.length > 0) {
-      return;
-    }
-    for (var childNode in node.children) {
-      var row = new FunctionCallTreeNodeRow(tree, depth + 1, profile, childNode);
-      children.add(row);
-    }
-  }
-}
-
-
-class CodeCallTreeNodeRow extends VirtualTreeRow {
-  final CpuProfile profile;
-  final CodeCallTreeNode node;
-  String selfPercent;
-  String totalPercent;
-  String percent;
-
-  static const kHotThreshold = 0.05;  // 5%.
-  static const kMediumThreshold = 0.02;  // 2%.
-
-  double _percent(bool self) {
-    if (self) {
-      return node.profileCode.normalizedExclusiveTicks;
-    } else {
-      return node.profileCode.normalizedInclusiveTicks;
-    }
-  }
-
-  bool isHot(bool self) => _percent(self) > kHotThreshold;
-  bool isMedium(bool self) => _percent(self) > kMediumThreshold;
-
-  String rowClass(bool self) {
-    if (isHot(self)) {
-      return 'hotProfile';
-    } else if (isMedium(self)) {
-      return 'mediumProfile';
-    } else {
-      return 'coldProfile';
-    }
-  }
-
-  CodeCallTreeNodeRow(VirtualTree tree,
-                      int depth,
-                      this.profile,
-                      CodeCallTreeNode node)
-      : node = node,
-        super(tree, depth) {
-    if ((node.profileCode.code.kind == M.CodeKind.tag) &&
-        (node.profileCode.normalizedExclusiveTicks == 0) &&
-        (node.profileCode.normalizedInclusiveTicks == 0)) {
-      selfPercent = '';
-      totalPercent = '';
-    } else {
-      selfPercent = Utils.formatPercentNormalized(
-          node.profileCode.normalizedExclusiveTicks);
-      totalPercent = Utils.formatPercentNormalized(
-          node.profileCode.normalizedInclusiveTicks);
-    }
-    percent = Utils.formatPercentNormalized(node.percentage);
-  }
-
-  void onRender(DivElement rowDiv) {
-    rowDiv.children.add(makeGap(ems:0.1));
-    rowDiv.children.add(
-        makeText(totalPercent,
-                 toolTip: 'global % on stack'));
-    rowDiv.children.add(makeGap());
-    rowDiv.children.add(
-        makeText(selfPercent,
-                 toolTip: 'global % executing'));
-    rowDiv.children.add(makeGap());
-    rowDiv.children.add(makeIndenter(depth, colored: false));
-    rowDiv.children.add(makeColorBar(depth));
-    rowDiv.children.add(makeGap(ems: 1.0));
-    rowDiv.children.add(makeExpander());
-    rowDiv.children.add(
-        makeText(percent, toolTip: 'tree node %', flexBasis: null));
-    rowDiv.children.add(makeGap(ems: 0.5));
-    codeRef.ref = node.profileCode.code;
-    rowDiv.children.add(codeRef);
-  }
-
-  var codeRef = new Element.tag('code-ref');
-
-  int get childCount => node.children.length;
-
-  void onShow() {
-    if (children.length > 0) {
-      return;
-    }
-    for (var childNode in node.children) {
-      var row = new CodeCallTreeNodeRow(tree, depth + 1, profile, childNode);
-      children.add(row);
-    }
-  }
-}
-
-/// Displays a CpuProfile
-@CustomTag('cpu-profile')
-class CpuProfileElement extends ObservatoryElement {
-  CpuProfileElement.created() : super.created() {
-    _updateTask = new Task(update);
-    _renderTask = new Task(render);
-  }
-
-  attached() {
-    super.attached();
-    sampleBufferControlElement =
-        shadowRoot.querySelector('#sampleBufferControl');
-    assert(sampleBufferControlElement != null);
-    sampleBufferControlElement.onSampleBufferUpdate = onSampleBufferChange;
-    stackTraceTreeConfigElement =
-        shadowRoot.querySelector('#stackTraceTreeConfig');
-    assert(stackTraceTreeConfigElement != null);
-    stackTraceTreeConfigElement.onTreeConfigChange = onTreeConfigChange;
-    cpuProfileVirtualTreeElement = shadowRoot.querySelector('#cpuProfileVirtualTree');
-    assert(cpuProfileVirtualTreeElement != null);
-    cpuProfileVirtualTreeElement.profile = sampleBufferControlElement.profile;
-    _resizeSubscription = window.onResize.listen((_) => _updateSize());
-    _updateTask.queue();
-    _updateSize();
-  }
-
-  detached() {
-    super.detached();
-    if (_resizeSubscription != null) {
-      _resizeSubscription.cancel();
-    }
-  }
-
-  _updateSize() {
-    var applySize = (e) {
-      Rectangle rect = e.getBoundingClientRect();
-      final totalHeight = window.innerHeight;
-      final bottomMargin = 200;
-      final mainHeight = totalHeight - bottomMargin;
-      e.style.setProperty('height', '${mainHeight}px');
-    };
-    HtmlElement e2 = $['cpuProfileVirtualTree'];
-    applySize(e2);
-  }
-
-  isolateChanged(oldValue) {
-    _updateTask.queue();
-  }
-
-  update() {
-    if (sampleBufferControlElement != null) {
-      sampleBufferControlElement.reload(isolate);
-    }
-  }
-
-  onSampleBufferChange(CpuProfile sampleBuffer) {
-    _renderTask.queue();
-  }
-
-  onTreeConfigChange(String modeSelector,
-                     String directionSelector,
-                     String filterString) {
-    ProfileTreeDirection direction = ProfileTreeDirection.Exclusive;
-    if (directionSelector != 'Up') {
-      direction = ProfileTreeDirection.Inclusive;
-    }
-    ProfileTreeMode mode = ProfileTreeMode.Function;
-    if (modeSelector == 'Code') {
-      mode = ProfileTreeMode.Code;
-    }
-    // Clear the filter.
-    cpuProfileVirtualTreeElement.filter = null;
-    if (filterString != null) {
-      filterString = filterString.trim();
-      if (filterString.isNotEmpty) {
-        cpuProfileVirtualTreeElement.filter = (CallTreeNode node) {
-          return node.name.contains(filterString);
-        };
-      }
-    }
-    cpuProfileVirtualTreeElement.direction = direction;
-    cpuProfileVirtualTreeElement.mode = mode;
-    _renderTask.queue();
-  }
-
-  Future clearCpuProfile() async {
-    await isolate.invokeRpc('_clearCpuProfile', { });
-    _updateTask.queue();
-    return new Future.value(null);
-  }
-
-  Future refresh() {
-    _updateTask.queue();
-    return new Future.value(null);
-  }
-
-  render() {
-    cpuProfileVirtualTreeElement.render();
-  }
-
-  @published Isolate isolate;
-
-  StreamSubscription _resizeSubscription;
-  Task _updateTask;
-  Task _renderTask;
-  SampleBufferControlElement sampleBufferControlElement;
-  StackTraceTreeConfigElement stackTraceTreeConfigElement;
-  CpuProfileVirtualTreeElement cpuProfileVirtualTreeElement;
-}
-
-class NameSortedTable extends SortedTable {
-  NameSortedTable(columns) : super(columns);
   @override
-  dynamic getSortKeyFor(int row, int col) {
-    if (col == FUNCTION_COLUMN) {
-      // Use name as sort key.
-      return rows[row].values[col].name;
-    }
-    return super.getSortKeyFor(row, col);
-  }
-
-  SortedTableRow rowFromIndex(int tableIndex) {
-    final modelIndex = sortedRows[tableIndex];
-    return rows[modelIndex];
-  }
-
-  static const FUNCTION_SPACER_COLUMNS = const [];
-  static const FUNCTION_COLUMN = 2;
-  TableRowElement _makeFunctionRow() {
-    var tr = new TableRowElement();
-    var cell;
-
-    // Add percentage.
-    cell = tr.insertCell(-1);
-    cell = tr.insertCell(-1);
-
-    // Add function ref.
-    cell = tr.insertCell(-1);
-    var functionRef = new Element.tag('function-ref');
-    cell.children.add(functionRef);
-
-    return tr;
-  }
-
-  static const CALL_SPACER_COLUMNS = const [];
-  static const CALL_FUNCTION_COLUMN = 1;
-  TableRowElement _makeCallRow() {
-    var tr = new TableRowElement();
-    var cell;
-
-    // Add percentage.
-    cell = tr.insertCell(-1);
-    // Add function ref.
-    cell = tr.insertCell(-1);
-    var functionRef = new Element.tag('function-ref');
-    cell.children.add(functionRef);
-    return tr;
-  }
-
-  _updateRow(TableRowElement tr,
-             int rowIndex,
-             List spacerColumns,
-             int refColumn) {
-    var row = rows[rowIndex];
-    // Set reference
-    var ref = tr.children[refColumn].children[0];
-    ref.ref = row.values[refColumn];
-
-    for (var i = 0; i < row.values.length; i++) {
-      if (spacerColumns.contains(i) || (i == refColumn)) {
-        // Skip spacer columns.
-        continue;
-      }
-      var cell = tr.children[i];
-      cell.title = row.values[i].toString();
-      cell.text = getFormattedValue(rowIndex, i);
-    }
-  }
-
-  _updateTableView(HtmlElement table,
-                   HtmlElement makeEmptyRow(),
-                   void onRowClick(TableRowElement tr),
-                   List spacerColumns,
-                   int refColumn) {
-    assert(table != null);
-
-    // Resize DOM table.
-    if (table.children.length > sortedRows.length) {
-      // Shrink the table.
-      var deadRows = table.children.length - sortedRows.length;
-      for (var i = 0; i < deadRows; i++) {
-        table.children.removeLast();
-      }
-    } else if (table.children.length < sortedRows.length) {
-      // Grow table.
-      var newRows = sortedRows.length - table.children.length;
-      for (var i = 0; i < newRows; i++) {
-        var row = makeEmptyRow();
-        row.onClick.listen((e) {
-          e.stopPropagation();
-          e.preventDefault();
-          onRowClick(row);
-        });
-        table.children.add(row);
-      }
-    }
-
-    assert(table.children.length == sortedRows.length);
-
-    // Fill table.
-    for (var i = 0; i < sortedRows.length; i++) {
-      var rowIndex = sortedRows[i];
-      var tr = table.children[i];
-      _updateRow(tr, rowIndex, spacerColumns, refColumn);
-    }
-  }
-}
-
-@CustomTag('cpu-profile-table')
-class CpuProfileTableElement extends ObservatoryElement {
-  CpuProfileTableElement.created() : super.created() {
-    _updateTask = new Task(update);
-    _renderTask = new Task(render);
-    var columns = [
-        new SortedTableColumn.withFormatter('Executing (%)',
-                                            Utils.formatPercentNormalized),
-        new SortedTableColumn.withFormatter('In stack (%)',
-                                            Utils.formatPercentNormalized),
-        new SortedTableColumn('Method'),
-    ];
-    profileTable = new NameSortedTable(columns);
-    profileTable.sortColumnIndex = 0;
-
-    columns = [
-        new SortedTableColumn.withFormatter('Callees (%)',
-                                            Utils.formatPercentNormalized),
-        new SortedTableColumn('Method')
-    ];
-    profileCalleesTable = new NameSortedTable(columns);
-    profileCalleesTable.sortColumnIndex = 0;
-
-    columns = [
-        new SortedTableColumn.withFormatter('Callers (%)',
-                                            Utils.formatPercentNormalized),
-        new SortedTableColumn('Method')
-    ];
-    profileCallersTable = new NameSortedTable(columns);
-    profileCallersTable.sortColumnIndex = 0;
-  }
-
-  attached() {
-    super.attached();
-    sampleBufferControlElement =
-        shadowRoot.querySelector('#sampleBufferControl');
-    assert(sampleBufferControlElement != null);
-    sampleBufferControlElement.onSampleBufferUpdate = onSampleBufferChange;
-    // Disable the tag selector- we always want no tags.
-    sampleBufferControlElement.tagSelector = 'None';
-    sampleBufferControlElement.showTagSelector = false;
-    stackTraceTreeConfigElement =
-        shadowRoot.querySelector('#stackTraceTreeConfig');
-    assert(stackTraceTreeConfigElement != null);
-    stackTraceTreeConfigElement.onTreeConfigChange = onTreeConfigChange;
-    stackTraceTreeConfigElement.modeSelector = 'Function';
-    stackTraceTreeConfigElement.showModeSelector = false;
-    stackTraceTreeConfigElement.directionSelector = 'Down';
-    stackTraceTreeConfigElement.showDirectionSelector = false;
-    cpuProfileTreeElement = shadowRoot.querySelector('#cpuProfileTree');
-    assert(cpuProfileTreeElement != null);
-    cpuProfileTreeElement.profile = sampleBufferControlElement.profile;
-    _updateTask.queue();
-    _resizeSubscription = window.onResize.listen((_) => _updateSize());
-    _updateSize();
-  }
-
-  detached() {
-    super.detached();
-    if (_resizeSubscription != null) {
-      _resizeSubscription.cancel();
-    }
-  }
-
-  _updateSize() {
-    HtmlElement e = $['main'];
-    final totalHeight = window.innerHeight;
-    final top = e.offset.top;
-    final bottomMargin = 32;
-    final mainHeight = totalHeight - top - bottomMargin;
-    e.style.setProperty('height', '${mainHeight}px');
-  }
-
-  isolateChanged(oldValue) {
-    _updateTask.queue();
-  }
-
-  update() {
-    _clearView();
-    if (sampleBufferControlElement != null) {
-      sampleBufferControlElement.reload(isolate).whenComplete(checkParameters);
-    }
-  }
-
-  onSampleBufferChange(CpuProfile sampleBuffer) {
-    _renderTask.queue();
-  }
-
-  onTreeConfigChange(String modeSelector,
-                     String directionSelector,
-                     String filterString) {
-    ProfileTreeDirection direction = ProfileTreeDirection.Exclusive;
-    if (directionSelector != 'Up') {
-      direction = ProfileTreeDirection.Inclusive;
-    }
-    ProfileTreeMode mode = ProfileTreeMode.Function;
-    if (modeSelector == 'Code') {
-      mode = ProfileTreeMode.Code;
-    }
-    cpuProfileTreeElement.direction = direction;
-    cpuProfileTreeElement.mode = mode;
-    _renderTask.queue();
-  }
-
-  Future clearCpuProfile() async {
-    await isolate.invokeRpc('_clearCpuProfile', { });
-    _updateTask.queue();
-    return new Future.value(null);
-  }
-
-  Future refresh() {
-    _updateTask.queue();
-    return new Future.value(null);
-  }
-
-  render() {
-    _updateView();
-  }
-
-  checkParameters() {
-    if (isolate == null) {
-      return;
-    }
-    var functionId = app.locationManager.uri.queryParameters['functionId'];
-    var functionName =
-        app.locationManager.uri.queryParameters['functionName'];
-    if (functionId == '') {
-      // Fallback to searching by name.
-      _focusOnFunction(_findFunction(functionName));
-    } else {
-      if (functionId == null) {
-        _focusOnFunction(null);
-        return;
-      }
-      isolate.getObject(functionId).then((func) => _focusOnFunction(func));
-    }
-  }
-
-  _clearView() {
-    profileTable.clearRows();
-    _renderTable();
-  }
-
-  _updateView() {
-    _buildFunctionTable();
-    _renderTable();
-    _updateFunctionTreeView();
-  }
-
-  int _findFunctionRow(ServiceFunction function) {
-    for (var i = 0; i < profileTable.sortedRows.length; i++) {
-      var rowIndex = profileTable.sortedRows[i];
-      var row = profileTable.rows[rowIndex];
-      if (row.values[NameSortedTable.FUNCTION_COLUMN] == function) {
-        return i;
-      }
-    }
-    return -1;
-  }
-
-  _scrollToFunction(ServiceFunction function) {
-    TableSectionElement tableBody = $['profile-table'];
-    var row = _findFunctionRow(function);
-    if (row == -1) {
-      return;
-    }
-    tableBody.children[row].classes.remove('shake');
-    // trigger reflow.
-    tableBody.children[row].offsetHeight;
-    tableBody.children[row].scrollIntoView(ScrollAlignment.CENTER);
-    tableBody.children[row].classes.add('shake');
-    // Focus on clicked function.
-    _focusOnFunction(function);
-  }
-
-  _clearFocusedFunction() {
-    TableSectionElement tableBody = $['profile-table'];
-    // Clear current focus.
-    if (focusedRow != null) {
-      tableBody.children[focusedRow].classes.remove('focused');
-    }
-    focusedRow = null;
-    focusedFunction = null;
-  }
-
-  ServiceFunction _findFunction(String functionName) {
-    for (var func in profile.functions) {
-      if (func.function.name == functionName) {
-        return func.function;
-      }
-    }
-    return null;
-  }
-
-  _focusOnFunction(ServiceFunction function) {
-    if (focusedFunction == function) {
-      // Do nothing.
-      return;
-    }
-
-    _clearFocusedFunction();
-
-    if (function == null) {
-      _updateFunctionTreeView();
-      _clearCallTables();
-      return;
-    }
-
-    var row = _findFunctionRow(function);
-    if (row == -1) {
-      _updateFunctionTreeView();
-      _clearCallTables();
-      return;
-    }
-
-    focusedRow = row;
-    focusedFunction = function;
-
-    TableSectionElement tableBody = $['profile-table'];
-    tableBody.children[focusedRow].classes.add('focused');
-    _updateFunctionTreeView();
-    _buildCallersTable(focusedFunction);
-    _buildCalleesTable(focusedFunction);
-  }
-
-  _onRowClick(TableRowElement tr) {
-    var tableBody = $['profile-table'];
-    var row = profileTable.rowFromIndex(tableBody.children.indexOf(tr));
-    var function = row.values[NameSortedTable.FUNCTION_COLUMN];
-    app.locationManager.goReplacingParameters(
-        {
-          'functionId': function.id,
-          'functionName': function.vmName
-        }
-    );
-  }
-
-  _renderTable() {
-    profileTable._updateTableView($['profile-table'],
-                                  profileTable._makeFunctionRow,
-                                  _onRowClick,
-                                  NameSortedTable.FUNCTION_SPACER_COLUMNS,
-                                  NameSortedTable.FUNCTION_COLUMN);
-  }
-
-  _buildFunctionTable() {
-    for (var func in profile.functions) {
-      if ((func.exclusiveTicks == 0) && (func.inclusiveTicks == 0)) {
-        // Skip.
-        continue;
-      }
-      var row = [
-        func.normalizedExclusiveTicks,
-        func.normalizedInclusiveTicks,
-        func.function,
-      ];
-      profileTable.addRow(new SortedTableRow(row));
-    }
-    profileTable.sort();
-  }
-
-  _renderCallTable(TableSectionElement view,
-                   NameSortedTable model,
-                   void onRowClick(TableRowElement tr)) {
-    model._updateTableView(view,
-                           model._makeCallRow,
-                           onRowClick,
-                           NameSortedTable.CALL_SPACER_COLUMNS,
-                           NameSortedTable.CALL_FUNCTION_COLUMN);
-  }
-
-  _buildCallTable(Map<ProfileFunction, int> calls,
-                  NameSortedTable model) {
-    model.clearRows();
-    if (calls == null) {
-      return;
-    }
-    var sum = 0;
-    calls.values.forEach((i) => sum += i);
-    calls.forEach((func, count) {
-      var row = [
-          count / sum,
-          func.function,
-      ];
-      model.addRow(new SortedTableRow(row));
-    });
-    model.sort();
-  }
-
-  _clearCallTables() {
-    _buildCallersTable(null);
-    _buildCalleesTable(null);
-  }
-
-  _onCallersClick(TableRowElement tr) {
-    var table = $['callers-table'];
-    final row = profileCallersTable.rowFromIndex(table.children.indexOf(tr));
-    var function = row.values[NameSortedTable.CALL_FUNCTION_COLUMN];
-    _scrollToFunction(function);
-  }
-
-  _buildCallersTable(ServiceFunction function) {
-    var calls = (function != null) ? function.profile.callers : null;
-    var table = $['callers-table'];
-    _buildCallTable(calls, profileCallersTable);
-    _renderCallTable(table, profileCallersTable, _onCallersClick);
-  }
-
-  _onCalleesClick(TableRowElement tr) {
-    var table = $['callees-table'];
-    final row = profileCalleesTable.rowFromIndex(table.children.indexOf(tr));
-    var function = row.values[NameSortedTable.CALL_FUNCTION_COLUMN];
-    _scrollToFunction(function);
-  }
-
-  _buildCalleesTable(ServiceFunction function) {
-    var calls = (function != null) ? function.profile.callees : null;
-    var table = $['callees-table'];
-    _buildCallTable(calls, profileCalleesTable);
-    _renderCallTable(table, profileCalleesTable, _onCalleesClick);
-  }
-
-  _changeSort(Element target, NameSortedTable table) {
-    if (target is TableCellElement) {
-      if (table.sortColumnIndex != target.cellIndex) {
-        table.sortColumnIndex = target.cellIndex;
-        table.sortDescending = true;
-      } else {
-        table.sortDescending = !profileTable.sortDescending;
-      }
-      table.sort();
-    }
-  }
-
-  changeSortProfile(Event e, var detail, Element target) {
-    _changeSort(target, profileTable);
-    _renderTable();
-  }
-
-  changeSortCallers(Event e, var detail, Element target) {
-    _changeSort(target, profileCallersTable);
-    _renderCallTable($['callers-table'], profileCallersTable, _onCallersClick);
-  }
-
-  changeSortCallees(Event e, var detail, Element target) {
-    _changeSort(target, profileCalleesTable);
-    _renderCallTable($['callees-table'], profileCalleesTable, _onCalleesClick);
-  }
-
-  //////
-  ///
-  /// Function tree.
-  ///
-  TableTree functionTree;
-  _updateFunctionTreeView() {
-    cpuProfileTreeElement.filter = (FunctionCallTreeNode node) {
-      return node.profileFunction.function == focusedFunction;
-    };
-    cpuProfileTreeElement.render();
-  }
-
-  @published Isolate isolate;
-  @observable NameSortedTable profileTable;
-  @observable NameSortedTable profileCallersTable;
-  @observable NameSortedTable profileCalleesTable;
-  @observable ServiceFunction focusedFunction;
-  @observable int focusedRow;
-
-
-  StreamSubscription _resizeSubscription;
-  Task _updateTask;
-  Task _renderTask;
-
-  CpuProfile get profile => sampleBufferControlElement.profile;
-  SampleBufferControlElement sampleBufferControlElement;
-  StackTraceTreeConfigElement stackTraceTreeConfigElement;
-  CpuProfileVirtualTreeElement cpuProfileTreeElement;
-}
-
-enum ProfileTreeDirection {
-  Exclusive,
-  Inclusive
-}
-
-enum ProfileTreeMode {
-  Code,
-  Function,
-}
-
-@CustomTag('cpu-profile-virtual-tree')
-class CpuProfileVirtualTreeElement extends ObservatoryElement {
-  ProfileTreeDirection direction = ProfileTreeDirection.Exclusive;
-  ProfileTreeMode mode = ProfileTreeMode.Function;
-  CpuProfile profile;
-  VirtualTree virtualTree;
-  CallTreeNodeFilter filter;
-  StreamSubscription _resizeSubscription;
-  @observable bool show = true;
-
-  CpuProfileVirtualTreeElement.created() : super.created();
-
   attached() {
     super.attached();
-    _resizeSubscription = window.onResize.listen((_) => _updateSize());
+    _r.enable();
+    _request();
   }
 
+  @override
   detached() {
-    super.detached();
-    _resizeSubscription?.cancel();
-  }
-
-  void render() {
-    _updateView();
+    super.detached(); _r.disable(notify: true);
+    children = [];
   }
 
-  showChanged(oldValue) {
-    if (show) {
-      virtualTree?.root?.style?.display = 'block';
-    } else {
-      virtualTree?.root?.style?.display = 'none';
-    }
-  }
-
-  void _updateView() {
-    _updateSize();
-    virtualTree?.clear();
-    virtualTree?.uninstall();
-    virtualTree = null;
-    bool exclusive = direction == ProfileTreeDirection.Exclusive;
-    if (mode == ProfileTreeMode.Code) {
-      _buildCodeTree(exclusive);
-    } else {
-      assert(mode == ProfileTreeMode.Function);
-      _buildFunctionTree(exclusive);
-    }
-    virtualTree?.refresh();
-  }
-
-  void _updateSize() {
-    var treeBody = shadowRoot.querySelector('#tree');
-    assert(treeBody != null);
-    int windowHeight = window.innerHeight - 32;
-    treeBody.style.height = '${windowHeight}px';
-  }
-
-  void _buildFunctionTree(bool exclusive) {
-    var treeBody = shadowRoot.querySelector('#tree');
-    assert(treeBody != null);
-    virtualTree = new VirtualTree(32, treeBody);
-    if (profile == null) {
-      return;
-    }
-    var tree = profile.loadFunctionTree(exclusive ? 'exclusive' : 'inclusive');
-    if (tree == null) {
-      return;
-    }
-    if (filter != null) {
-      tree = tree.filtered(filter);
-    }
-    for (var child in tree.root.children) {
-      virtualTree.rows.add(
-          new FunctionCallTreeNodeRow(virtualTree, 0, profile, child));
-    }
-    if (virtualTree.rows.length == 1) {
-      virtualTree.rows[0].expanded = true;
-    }
-  }
-
-  void _buildCodeTree(bool exclusive) {
-    var treeBody = shadowRoot.querySelector('#tree');
-    assert(treeBody != null);
-    virtualTree = new VirtualTree(32, treeBody);
-    if (profile == null) {
-      return;
-    }
-    var tree = profile.loadCodeTree(exclusive ? 'exclusive' : 'inclusive');
-    if (tree == null) {
-      return;
-    }
-    if (filter != null) {
-      tree = tree.filtered(filter);
-    }
-    for (var child in tree.root.children) {
-      virtualTree.rows.add(
-          new CodeCallTreeNodeRow(virtualTree, 0, profile, child));
-    }
-    if (virtualTree.rows.length == 1) {
-      virtualTree.rows[0].expanded = true;
-    }
-  }
-}
-
-@CustomTag('cpu-profile-tree')
-class CpuProfileTreeElement extends ObservatoryElement {
-  ProfileTreeDirection direction = ProfileTreeDirection.Exclusive;
-  ProfileTreeMode mode = ProfileTreeMode.Function;
-  CpuProfile profile;
-  TableTree codeTree;
-  TableTree functionTree;
-  CallTreeNodeFilter functionFilter;
-  @observable bool show = true;
-
-  CpuProfileTreeElement.created() : super.created();
-
   void render() {
-    _updateView();
-  }
-
-  showChanged(oldValue) {
-    var treeTable = shadowRoot.querySelector('#treeTable');
-    assert(treeTable != null);
-    treeTable.style.display = show ? 'table' : 'none';
-  }
-
-  void _updateView() {
-    if (functionTree != null) {
-      functionTree.clear();
-      functionTree = null;
-    }
-    if (codeTree != null) {
-      codeTree.clear();
-      codeTree = null;
-    }
-    bool exclusive = direction == ProfileTreeDirection.Exclusive;
-    if (mode == ProfileTreeMode.Code) {
-      _buildCodeTree(exclusive);
-    } else {
-      assert(mode == ProfileTreeMode.Function);
-      _buildFunctionTree(exclusive);
-    }
-  }
-
-  void _buildFunctionTree(bool exclusive) {
-    if (functionTree == null) {
-      var tableBody = shadowRoot.querySelector('#treeBody');
-      assert(tableBody != null);
-      functionTree = new TableTree(tableBody, 2);
-    }
-    if (profile == null) {
-      return;
-    }
-    var tree = profile.loadFunctionTree(exclusive ? 'exclusive' : 'inclusive');
-    if (tree == null) {
-      return;
-    }
-    if (functionFilter != null) {
-      tree = tree.filtered(functionFilter);
-    }
-    var rootRow =
-        new FunctionProfileTreeRow(functionTree, null, profile, tree.root);
-    functionTree.initialize(rootRow);
-  }
-
-  void _buildCodeTree(bool exclusive) {
-    if (codeTree == null) {
-      var tableBody = shadowRoot.querySelector('#treeBody');
-      assert(tableBody != null);
-      codeTree = new TableTree(tableBody, 2);
-    }
-    if (profile == null) {
-      return;
-    }
-    var tree = profile.loadCodeTree(exclusive ? 'exclusive' : 'inclusive');
-    if (tree == null) {
+    var content = [
+      new NavBarElement(queue: _r.queue)
+        ..children = [
+          new NavTopMenuElement(queue: _r.queue),
+          new NavVMMenuElement(_vm, _events, queue: _r.queue),
+          new NavIsolateMenuElement(_isolate, _events, queue: _r.queue),
+          new NavMenuElement('cpu profile', link: Uris.profiler(_isolate),
+              last: true, queue: _r.queue),
+          new NavRefreshElement(queue: _r.queue)
+              ..onRefresh.listen(_refresh),
+          new NavRefreshElement(label: 'Clear', queue: _r.queue)
+              ..onRefresh.listen(_clearCpuProfile),
+          new NavNotifyElement(_notifications, queue: _r.queue)
+        ],
+    ];
+    if (_progress == null) {
+      children = content;
       return;
     }
-    var rootRow = new CodeProfileTreeRow(codeTree, null, profile, tree.root);
-    codeTree.initialize(rootRow);
+    content.add(new SampleBufferControlElement(_progress, _progressStream,
+      selectedTag: _tag, queue: _r.queue)
+      ..onTagChange.listen((e) {
+        _tag = e.element.selectedTag;
+        _request();
+    }));
+    if (_progress.status == M.SampleProfileLoadingStatus.loaded) {
+      CpuProfileVirtualTreeElement tree;
+      content.addAll([
+        new BRElement(),
+        new StackTraceTreeConfigElement(mode: _mode, direction: _direction,
+          filter: _filter, queue: _r.queue)
+            ..onModeChange.listen((e) {
+              _mode = tree.mode = e.element.mode;
+            })
+            ..onFilterChange.listen((e) {
+              _filter = e.element.filter.trim();
+              tree.filter = _filter.isNotEmpty
+                ? (node) { return node.name.contains(_filter); }
+                : null;
+            })
+            ..onDirectionChange.listen((e) {
+              _direction = tree.direction = e.element.direction;
+            }),
+        new BRElement(),
+        tree = new CpuProfileVirtualTreeElement(_isolate, _progress.profile,
+            queue: _r.queue)
+      ]);
+    }
+    children = content;
+  }
+
+  Future _request({bool clear: false, bool forceFetch: false}) async {
+    _progress = null;
+    _progressStream = _profiles.get(isolate, _tag, clear: clear,
+        forceFetch: forceFetch);
+    _r.dirty();
+    _progress = (await _progressStream.first).progress;
+    _r.dirty();
+    if (M.isSampleProcessRunning(_progress.status)) {
+      _progress = (await _progressStream.last).progress;
+      _r.dirty();
+    }
+  }
+
+  Future _clearCpuProfile(RefreshEvent e) async {
+    e.element.disabled = true;
+    await _request(clear: true);
+    e.element.disabled = false;
+  }
+
+  Future _refresh(e) async {
+    e.element.disabled = true;
+    await _request(forceFetch: true);
+    e.element.disabled = false;
   }
 }